Daifuku (大福 — "great luck") is the most commercially successful form of daifuku mochi — a thin, yielding mochi skin wrapped around a filling. The original form used simple koshi-an; by the Edo period daifuku were sold by street vendors throughout Tokyo. The ichigo (strawberry) daifuku, created in the 1980s by a Tokyo confectioner who placed a whole strawberry inside the an before wrapping in mochi, became a sensation and a category — now the most recognisable Japanese confection globally after mochi ice cream (itself a daifuku variant).
The daifuku tradition has expanded significantly beyond the original an filling, revealing the mochi skin as the neutral carrier the nerikiri skin is in wagashi — a vehicle whose job is to yield and deliver without competing:
1. Mochi skin thickness for daifuku: 4–6mm. Thinner than this tears during filling; thicker than this dominates the filling. 2. Filling temperature: refrigerator-cold. Room temperature filling stretches the mochi during wrapping and produces a skin that is uneven — thinner at the base where the filling pulled the skin downward. 3. The pinch closure: daifuku is sealed by pinching the mochi skin together at the base — the closed end is placed face-down. The pinch must be clean — any exposed filling creates a point of structural weakness. Sensory tests: - **The stretch test:** As the mochi skin is pulled over the filling, it should stretch evenly without tearing — a uniform translucent membrane. Any tearing indicates the skin is too cold (brittle) or too thin. - **The immediate yield:** When bitten, the mochi should yield completely at the first contact with teeth — not resist, not stretch back. Immediate clean separation through the skin. - **Flavour sequence:** For ichigo daifuku: mochi (subtle, slightly sweet rice starch), then an (earthy sweetness), then strawberry (acid-sweet brightness). The sequence is temporal — approximately 2 seconds from first bite to strawberry. This delay is structural.
Japanese Confectionery Deep: Wagashi, An, Mochi & the Seasonal Sweet Tradition